The synergy between cementite spheroidization and Cu alloying on the corrosion resistance of ferrite-pearlite steel in acidic chloride solution

Hu, Liu; Wei, Jie; Dong, Jie; Zhou, Yangtao; Chen, Yiqing; Wu, Yifei; Babu, Subedi Dhruba; Umoh, Aniefiok Joseph; Ke, Wei

doi:10.1016/j.jmst.2020.12.031

Cited by 18 publications

(3 citation statements)

References 32 publications

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“…From this point, the P regions might be the preferred site for pit formation. As the immersion time increased, the fast-aggregating cathodic cementite resulted in an increase in cathode-anode area ratio, which intensified the micro-galvanic effect and further accelerated the dissolution of anodic F [17,29]. Once the initial pits formed, the existence of remained cathodic Fe 3 C in the pits further accelerated the corrosion of ferrite in the pits, leading to the fast expansion of pits and severe localized corrosion ultimately, as shown in Figure 8.…”

Section: Influence Of Microstructure On Facmentioning

confidence: 98%

Microstructural Understanding of Flow Accelerated Corrosion of SA106B Carbon Steel in High-Temperature Water with Different Flow Velocities

Xin

Hong

et al. 2023

Materials

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All light or heavy water reactors fabricated with carbon steels suffer from flow-accelerated corrosion (FAC). The FAC degradation of SA106B with different flow velocities was investigated in terms of microstructure. As flow velocity increased, the major corrosion type changed from general corrosion to localized corrosion. Severe localized corrosion occurred in the pearlite zone, which can be the prior location for generating pits. After normalizing, the improvement in microstructure homogeneity reduced the oxidation kinetics and lowered cracking sensitivity, causing a decrease in FAC rates of 33.28%, 22.47%, 22.15%, and 17.53% at flow velocity of 0 m/s, 1.63 m/s, 2.99 m/s, and 4.34 m/s, respectively. Additionally, localized corrosion tendency was decreased by reducing the micro-galvanic effect and tensile stresses in oxide film. The maximum localized corrosion rate decreased by 21.7%, 13.5%, 13.8%, and 25.4% at flow velocity of 0 m/s, 1.63 m/s, 2.99 m/s, and 4.34 m/s, respectively.

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Section: Influence Of Microstructure On Facmentioning

confidence: 98%

Microstructural Understanding of Flow Accelerated Corrosion of SA106B Carbon Steel in High-Temperature Water with Different Flow Velocities

Xin

Hong

et al. 2023

Materials

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“…To date, 45 steel has been widely used in machinery manufacturing, automobiles, construction, mining equipment, and other fields because of its commendable mechanical properties, processing performance, and low cost [1][2][3][4]. However, the wear resistance of 45 steel is insufficient, meaning it may not meet the criteria in some application scenarios requiring high wear resistance and results in the premature wear of parts.…”

Section: Introductionmentioning

confidence: 99%

Effect of CeO2 Content on Microstructure and Wear Resistance of Laser-Cladded Ni-Based Composite Coating

Zhang,

Shi,

Lin

et al. 2024

Lubricants

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In order to improve the wear resistance of 45 steel, in this study, WC/Ni60 composite coatings with different CeO2 additions (0, 1, 2, and 3 wt%) were prepared on 45 steel by the laser cladding technique; the experimental analysis was carried out by means of scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), a Vickers hardness tester, and a friction and wear tester. The results show that CeO2 had little effect on the phase composition of the coatings; however, with the increase in CeO2 content, the CeO2 played a key role in refining the grains of the coating, thus reducing the generation of cracks. In addition, CeO2 could effectively strengthen the internal structure of the coating and improve its microhardness and wear resistance. Particularly noteworthy is the observed reduction in both the friction coefficient and mass loss of the coating when the CeO2 addition reached 2%. This suggests an enhancement in the tribological performance of the coating at this concentration.

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“…Because of the adverse effects of the multiphase structure, they are susceptible to corrosion during service. This is because micro-galvanic couples are easily formed between ferrite and cementite on the surface of ferrite-pearlite steels in corrosive solutions, where cementite as the cathode is continuously accumulated leading to the enhanced corrosion (Wang et al , 2021; Liu et al , 2021; Gu et al , 2023; Hao et al , 2021; Song et al , 2022; Anijdan et al , 2022; Xia et al , 2022). Therefore, weakening the micro-galvanic corrosion will be beneficial for improving the corrosion resistance of the ferrite-pearlite steel, which is important for its engineering application in the marine environment.…”

Section: Introductionmentioning

confidence: 99%

The microstructure and corrosion behavior of Cr-containing ferrite-pearlite steels in an acidic environment

Hao

Wang

Guo

et al. 2023

ACMM

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Purpose The poor corrosion resistance of the ferrite-pearlite steel limits its application in marine engineering because of the enhanced galvanic effect caused by continuously accumulated cementite. Cr as one principal alloying element is commonly used to improve the corrosion resistance of steels. This paper aims to study the effect of Cr on corrosion behaviors of ferrite-pearlite steels in an acidic environment. Design/methodology/approach The tested steels were immersed in a simulated solution of 10 Wt.% NaCl with pH 0.85 for 72 h to evaluate the corrosion rate. After the immersion test, the corrosion morphologies and products were tested by scanning electron microscopy, energy dispersive X-ray analysis and X-ray diffraction. Meanwhile, an electrochemical workstation was used to study the electrochemical behaviors of samples. Findings At the initial corrosion stage, the corrosion rate increased in the sequence of Cr0, Cr0.5 and Cr1 steels, which was because of the competitive effect between the area ratio and the driving force caused by alloyed Cr. However, Cr1 steel exhibited the best corrosion resistance after a 72-h immersion test. This was because the alloyed Cr promoted the formation of protective Fe2O3 and FeCr2O4, which suppressed the preferential dissolution of ferrite and, thus, reduced the accumulation rate of carbides, resulting in the weakened galvanic corrosion. Originality/value This paper reports the role that Cr plays in the galvanic corrosion of ferrite-pearlite steels, which is important for the engineering application of ferrite-pearlite steels in marine environment.

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The synergy between cementite spheroidization and Cu alloying on the corrosion resistance of ferrite-pearlite steel in acidic chloride solution

Cited by 18 publications

References 32 publications

Microstructural Understanding of Flow Accelerated Corrosion of SA106B Carbon Steel in High-Temperature Water with Different Flow Velocities

Microstructural Understanding of Flow Accelerated Corrosion of SA106B Carbon Steel in High-Temperature Water with Different Flow Velocities

Effect of CeO2 Content on Microstructure and Wear Resistance of Laser-Cladded Ni-Based Composite Coating

The microstructure and corrosion behavior of Cr-containing ferrite-pearlite steels in an acidic environment

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